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协同分子内电荷转移促进了Au纳米集群,具有增强的NIR-II光发光

Shuxian Li¹, Wei Ge², Xiaoyu Huang³

¹School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, P.R. China.

The journal of physical chemistry letters

|January 27, 2025

概括

研究人员增强了黄金纳米集群.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
摄影化学的使用.

背景情况:

黄金纳米集群 (AuNCs) 是有前途的近红外II (NIR-II) 发光材料.
低光发光效率 (<0.2%) 阻碍了它们的应用.
改善NIR-II排放对于AuNCs至关重要.

研究的目的:

在NIR-II地区提高Au NC的光发效率.
研究一种协同作用的分子内电荷转移 (ICT) 策略.
探索用于增强发光的铜兴奋剂和配体修饰.

主要方法:

协同作用的分子内电荷转移 (ICT) 策略.
在AUNCs中使用异原子铜化.
连接物修饰 (p-MBA 脱质).

主要成果:

实现了NIR-II光量子产量的6倍增长,达到5.59%.
在Au NC核心和连接体之间证明了增强的电荷传输.
抑制了非辐射衰变路径,增加了排放强度.

结论:

协同的ICT战略有效地增强了Au NC的发光.
铜注和联体脱是提高性能的关键.
为调整Au NC光发光特性提供了一个简单的方法.

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